Re:
regarding comparing prices on sold stuff, this may sound irritating but you can't say it's worth more because alot has been spent on it, it's unfortunate but it doesn't seem to work like that, frankly none of us will ever get our money back on the stuff we sell, someone may have got a bargain at £406, even if they bung £1000 at it for a lot of mint parts doesn't make it worth £1400 etc, it's worth what someone will pay, ie what you can get for it, frankly i have a vit T2 with arguably a better spec than yours, it's mint and it's lovely, i'd guess the value at £800 if i split it down, it's worth more in bits than as a whole.
and FYI, the use of the term "NOS", i think it irritates alot of people because people use it not knowing what it actually means, it's sort of like a regular faux pas in this type of interest that we see alot.
hope you get your sale price, or somewhere near it but (and i don't mean to rude) i think you're aiming a little high.